I was wondering something, does the curse on Frog needed Magus to maintain it? I mean if I was a powerful sorcerer who could change people into frogs for fun and summons Lavos, I would put a curse that I don't have to focus for it to use, so for me Magus has nothing more to do on the curse and he never would/could dispel the effect. So I was thinking that maybe the curse was "fed" by Glenn's feelings about being a useless frogs to everybody and his grudge against hiself. I never played the PSX version or saw Glenn in his human form except when he was on the bridge with Cyrus who told him to join the army because he was a better swordman than him, so I think that by defeating (did he really died?) Magus his grudge was nearly all gone and he only had to kill Lavos to prove to hiself that he was worthy and the revert back to his human self.